[PATCH] get_empty_filp tweaks, inline epoll_init_file()

Eliminate a handful of cache references by keeping current in a register
instead of reloading (helps x86) and avoiding the overhead of a function
call.  Inlining eventpoll_init_file() saves 24 bytes.  Also reorder file
initialization to make writes occur more sequentially.

Signed-off-by: Benjamin LaHaise <bcrl@linux.intel.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/include/linux/eventpoll.h b/include/linux/eventpoll.h
index 1289f0ec4c00..1e4bdfcf83a2 100644
--- a/include/linux/eventpoll.h
+++ b/include/linux/eventpoll.h
@@ -52,7 +52,12 @@ struct file;
 #ifdef CONFIG_EPOLL
 
 /* Used to initialize the epoll bits inside the "struct file" */
-void eventpoll_init_file(struct file *file);
+static inline void eventpoll_init_file(struct file *file)
+{
+        INIT_LIST_HEAD(&file->f_ep_links);
+        spin_lock_init(&file->f_ep_lock);
+}
+
 
 /* Used to release the epoll bits inside the "struct file" */
 void eventpoll_release_file(struct file *file);
@@ -85,7 +90,6 @@ static inline void eventpoll_release(struct file *file)
         eventpoll_release_file(file);
 }
 
-
 #else
 
 static inline void eventpoll_init_file(struct file *file) {}